Signal Conditioning Operational Amplifiers (Op Amps) Low Power Amplifiers (Is < 1mA)
Signal Conditioning Operational Amplifiers (Op Amps) Precision Amplifiers (Vos < 0.75mV)
 Space & Harsh Environment Extended Temperature Plastic (H & MP) Extended Temperature (H & MP) Op Amps

LT1639 - 1.2MHz, 0.4V/us Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps

Features

  • Operates with Inputs Above V+
  • Rail-to-Rail Input and Output
  • Low Power: 230μA per Amplifier Max
  • Gain Bandwidth Product: 1.2MHz
  • Slew Rate: 0.4V/μs
  • High Output Current: 25mA Min
  • Specified on 3V, 5V and ±15V Supplies
  • Reverse Battery Protection to 18V
  • No Supply Sequencing Problems
  • High Voltage Gain: 1500V/mV
  • Single Supply Input Range: –0.4V to 44V
  • High CMRR: 98dB
  • No Phase Reversal
  • Available in 14-Lead SO, 8-Lead MSOP and DFN Packages

Typical Application

LT1639 Typical Application
LT1639 Typical Application

Description

The LT®1638 is a low power dual rail-to-rail input and output operational amplifier available in the standard 8-pin PDIP and SO packages as well as the 8-lead MSOP package. The LT1639 is a low power quad rail-to-rail input and output operational amplifier offered in the standard 14-pin PDIP and surface mount packages. For space limited applications the LT1638 is available in a 3mm x 3mm x 0.8mm dual fine pitch leadless package (DFN).

The LT1638/LT1639 op amps operate on all single and split supplies with a total voltage of 2.5V to 44V drawing only 170μA of quiescent current per amplifier. These amplifiers are reverse battery protected and draw no current for reverse supply up to 18V.

The input range of the LT1638/LT1639 includes both supplies, and a unique feature of this device is its capability to operate over the top with either or both of its inputs above V+. The inputs handle 44V, both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs from occurring when the inputs are below the negative supply. Protective resistors are included in the input leads so that current does not become excessive when the inputs are forced below the negative supply. The LT1638/LT1639 can drive loads up to 25mA and still maintain rail-to-rail capability. The op amps are unity-gain stable and drive all capacitive loads up to 1000pF when optional output compensation is used.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LT1639CN#PBF N-14 N C 05-08-1510 (N14) Yes
LT1639CS#PBF SO-14 S C 05-08-1610 (S14) Yes
LT1639CS#TRPBF SO-14 S C 05-08-1610 (S14) Yes
LT1639HS#PBF SO-14 S H 05-08-1610 (S14) Yes
LT1639HS#TRPBF SO-14 S H 05-08-1610 (S14) Yes
LT1639IN#PBF N-14 N I 05-08-1510 (N14) Yes
LT1639IS#PBF SO-14 S I 05-08-1610 (S14) Yes
LT1639IS#TRPBF SO-14 S I 05-08-1610 (S14) Yes


LT1639 Package Drawing
LT1639 Package Drawing
LT1639 Package Drawing
LT1639 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LT1639CN#PBF N-14 C $4.15 $3.30 Yes
LT1639CS#PBF SO-14 C $4.25 $3.40 Yes
LT1639CS#TRPBF SO-14 C $3.46 Yes
LT1639HS#PBF SO-14 H $5.00 $4.20 Yes
LT1639HS#TRPBF SO-14 H $4.26 Yes
LT1639IN#PBF N-14 I $4.75 $4.00 Yes
LT1639IS#PBF SO-14 I $4.90 $4.10 Yes
LT1639IS#TRPBF SO-14 I $4.16 Yes
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Battery- or Solar-Powered Systems
    Portable Instrumentation
    Sensor Conditioning
  • Supply Current Sensing
  • Battery Monitoring
  • Micropower Active Filters
  • 4mA to 20mA Transmitters

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LT1639

Technical Support